Monthly Archives: May 2008

Eruption Column Demonstration

We were recently shown a paper by Karen S. Harpp, Alison M. Koleszar, and L. Dennis Geist that presented instructions for the safe demonstration of an explosive volcanic eruption.   In less than a second, the explosion carries up to 20 … Continue reading

Posted in Education

Ubinas, Peru

Based on SIGMET reports, the Buenos Aires VAAC reported that during 22-24 May ash plumes from Ubinas rose to altitudes of 4.9-7.9 km (16,000 and 26,000 ft) a.s.l. and drifted S, E, NE, and SE. On 26 May, a pilot … Continue reading

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Tungurahua, Ecuador

The IG reported that although visual observations were occasionally limited due to cloud cover during 21-27 May, ash and ash-and-steam plumes, often generated by explosions from Tungurahua, were spotted and rose to altitudes of 5.8-9 km (19,000-29,500 ft) a.s.l. Ash … Continue reading

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Soufriére Hills, Montserrat, West Indies

MVO reported that activity at Soufrière Hills decreased slightly during 17-23 May. On 23 May, several pulses of ash venting from Gages vent to the W produced ash plumes to an altitude of approximately 1.8 km (5,900 ft) a.s.l. and … Continue reading

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Shiveluch, Russia

KVERT reported that seismic activity at Shiveluch was at background levels during 15-17 and 21 May and above background levels the other days during 16-23 May; gas-and-ash explosions may have occurred on 18, 19, and 20 May. According to video … Continue reading

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Santa María, Guatemala

INSIVUMEH reported explosions from Santa María’s Santiaguito lava dome complex during 22-27 May. Resultant ash plumes seen during breaks in cloud cover rose to altitudes of 4.1-4.4 km (13,500-14,400 ft) a.s.l. and drifted S and SW. Ashfall was reported in … Continue reading

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Sakura-Jima, Japan

Based on information from JMA, the Tokyo VAAC reported that on 22 May an eruption plume from Sakura-jima rose to altitudes of 2.4 km (8,000 ft) a.s.l. and drifted NE. An explosion was reported on 24 May. Source: Tokyo Volcanic … Continue reading

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